05:12 Design, Engineering & Technology Blood, concrete, and dynamite: Building the Hoover Dam Lesson duration 05:12 1,023,479 Views
05:05 Social Studies How one of the most profitable companies in history rose to power Lesson duration 05:05 888,683 Views
04:34 Science & Technology Why do your jeans wear out so quickly? Lesson duration 04:34 365,320 Views
08:15 Social Studies Why the US Army tried to exterminate the bison Lesson duration 08:15 1,660,149 Views
09:44 Social Studies Ruby Bridges: The child who defied a mob and desegregated her school Lesson duration 09:44 491,804 Views
04:57 Literature & Language The twins who tricked the Maya gods of death Lesson duration 04:57 2,044,845 Views
05:25 Literature & Language The Norse myth that inspired “The Lord of the Rings” Lesson duration 05:25 3,070,313 Views
04:47 Social Studies Why are scientists obsessed with the Black Sea? Lesson duration 04:47 471,755 Views
04:35 Social Studies What happened to the lost Kingdom of Kush? Lesson duration 04:35 1,054,119 Views
05:26 Literature & Language The surprising origins of the word “lesbian” Lesson duration 05:26 774,415 Views
04:48 Social Studies The infamous overpopulation bet: Simon vs. Ehrlich Lesson duration 04:48 589,608 Views
05:27 Science & Technology Is this the most successful animal ever? Lesson duration 05:27 520,606 Views
05:29 Social Studies The secret society of the Great Dismal Swamp Lesson duration 05:29 313,053 Views